[GRASS5] [bug #3686] (grass) NVIZ: severe problems with animations

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this bug's URL: http://intevation.de/rt/webrt?serial_num=3686
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Subject: NVIZ: severe problems with animations

Platform: GNU/Linux/i386
grass obtained from: Trento Italy site
grass binary for platform: Compiled from Sources

Peter Loewe:

Ever since the improvements regarding the POV positioning were integrated in NVIZ (2004?!), a new bug appeared when one attempts to create animations.
It is not just annoying, but makes serious animation-work almost impossible.

Here's how to experience it: Create a new frame-animation. Lets just circle around the center-point of a given DEM (spearfish will do nicely). Lets start in the south and lets have a total of 100 frames. Once the puck has been set to deep south (never change the altitude), add the frame "0". Then add the frame "100" since we want to fly in a circle. Now move the puck up to the far north and make this position frame number "50".
Until now, everything is fine.

Now move the frame-slider to "25" to complete the first half of the flight path: The POV will be "somewhere" overlooking the DEM.
This is where the magic starts: Any movement of the puck to get the POV in the proper position will result in a POV pointing into limbo (definitely no DEM to be found)

Dirty hack: Use the CENTER-button to get the DEM back into view.
This workaround allows to complete this rather humble example.

However, the workaround fails when the elevation/altitude has been manipulated as well, resulting in animations similar to rollercoster-rides.

Can we please have a well-behaved puck/POV-behaviour again ?

 


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